BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, NOVEMBER 7, 2015 ALL TIMES ARE IN EASTERN STANDARD TIME RECORD HIGH TEMPERATURE OF 71F EQUALED ON FRIDAY... HIGH MINIMUM TEMPERATURE SURPASSED FRIDAY'S RECORD AND TIES MONTHLY RECORD...PARTIAL CLOUDINESS THIS MORNING TURNS TO OVERCAST THIS AFTERNOON AS COOLER AND DRIER AIR RETURNS... The high temperature on Friday of 71F tied the record high maximum for the date previously set in 1959. The low temperature of 60F set a new record high minimum for the date, surpassing 58F set in 1938. This also ties the high minimum temperature record of 60F for the month set on November 8th in 1996. The mean temperature of 66F on Friday made this the warmest November day (in terms of the mean) since Nov 4, 1990, and this was the first cooling degree day in November since that date. This was only the eighth November day in over 130 years that had a mean temperature of 66F or higher (and a CDD of 1 or more). Cooler air is gradually returning to New England today, though the temperature has remained in the 50s all day with a gusty west wind. The high temperature for today will likely be 64F back at midnight. The dew point has dropped from about 50F just after midnight to the low 30s by mid-afternoon. As a result the visiblity has improved from near 70 miles earlier today to better than 80 miles during the afternoon. BHO November Cooling Degree Days (1885-2015): 1) 3 on Nov 2, 1950 (81/54/68) 2) 2 on Nov 7, 1938 (75/58/67) 2 on Nov 3, 1990 (75/58/67) 4) 1 on Nov 3, 1927 (72/59/66) 1 on Nov 1, 1956 (74/58/66) 1 on Nov 4, 1987 (77/55/66) 1 on Nov 4, 1990 (75/57/66) 1 on Nov 6, 2015 (71/60/66) PRELIMINARY STATS FOR OCTOBER 2015 TEMPERATURE, Deg. F Avg. Max. 59.9 [-0.4] Avg. Min. 43.1 [+0.2] Mean 51.5 [-0.1] Corrected mean: 51.1 Max. for month: 76 on 12th Min. for month: 26 on 19th COOLING DEGREE DAYS Total cooling units: 0 [-5] Total for the season: 810 [+208] Total for last season: 595 HEATING DEGREE DAYS Total heating units: 411 [-10] Total for the season: 454 [-109] Total for last season: 422 PRECIPITATION, Inches Total: 2.69 [-2.00] Greatest in 24 hrs: 1.58 from 28th-29th WIND, mph Avg. uncorrected wind speed: 12.6 Avg. corrected wind speed: 12.9 Prevailing wind direction: NNW @ 13% Peak gust and direction: 53 SSE on the 28th, S on the 29th SUNSHINE: Campbell-Stokes card minutes: 11238/19824 or 57% Astronomical total minutes: 11666/20566 or 57% Today's Observations: 7 A.M. Weather: Scattered altocumulus, scattered dense cirrus, thin overcast cirrus, few stratocumulus distant NW-NNW Temperature: 55F; Dew Point: 43F; Wind: W at 13 kts, Sea-level pressure: 29.92 ins. Hg, rising then more quickly Visibility: 70 miles 6-hr Max temp: 62F 6-hr Min temp: 55F 24-hr precip: 0.00 ins. BHO SA 1155 110 SCT 200 SCT 250 -OVC 70 135/55/43/2713/992/ FEW SC DSNT NW-NNW/ 8/531 53019 10062 20055 10 A.M. Weather: Scattered altocumulus (2 layers), scattered dense cirrus, thin overcast cirrus, few stratocumulus W-NE Temperature: 58F; Dew Point 38F; Wind: W at 16G25 kts, Wind: Peak wind 28 kts W at 8:56 A.M. Sea-level pressure: 29.96 ins. Hg, falling, Visibility: 65 miles, light distant haze BHO SA 1455 80 SCT 110 SCT 150 SCT 250 -OVC 65 145/58/38/2816G25/ 996/ FEW SC W-NE LGT DSNT HZ PK WND 2828/1356/ 8/57/ 50010 1 P.M. Weather: Scattered stratocumulus, broken altostratus, overcast cirrostratus and cirrus, few altocumulus S-SW, sun dimly visible Temperature: 58F; Dew Point 35F; Wind: W at 17G23 kts Wind: Peak wind 27 kts W at 12:38 P.M. Sea-level pressure: 29.94 ins. Hg, falling Visibility: 75 miles 6-hr max. temp. 60F 6-hr min. temp. 54F BHO SA 1755 45 SCT E160 BKN 200 OVC 75 138/58/35/2817G23/994/ FEW AC S-SW SUN DMLY VSBL PK WND 2827/38/ 8/578 56007 10060 20054 SUMMARY FOR FRIDAY, NOVEMBER 6, 2015 TEMPERATURE (DEGREES F) MAX.....71 NORMAL.....53 MIN.....60 NORMAL.....36 MEAN....66 NORMAL.....45 DEPARTURE FROM 30-YEAR NORMAL.....................+21 TOTAL DEPARTURE FOR THE MONTH.....................+78 [+12.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............0 DEPARTURE.........-20 TOTAL HEATING UNITS FOR THE MONTH..............40 DEPARTURE.........-76 TOTAL HEATING UNITS FOR THE SEASON............494 DEPARTURE........-186 TOTAL HEATING UNITS LAST SEASON TO DATE.......536 DIFFERENCE........-42 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................35 SSW AT 2:00 P.M. * ASOS........................38 SSW AT 1:46 P.M. DAVIS.......................37 SSW AT 1:45 P.M. RMY 38 FASTEST MILE FOR YESTERDAY.....................30 SSW AT 1:47 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................30 SSW AT 1:47 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................29 SW AT 1:47 P.M. AVERAGE WIND SPEED AND DIRECTION.............16.4 SW ASOS......................16.4 DAVIS.....................15.2 SW [228 Deg.] * Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00 DEPARTURE.....-0.15 ASOS...............0.00 TOTAL PRECIPITATION FOR THE MONTH..........TRACE DEPARTURE.....-0.93 ASOS...............0.00 TOTAL PRECIPITATION FOR THE YEAR...........36.83 DEPARTURE.....-7.87 ASOS................N/A *** *** ASOS annual total not available due to erroneous readings PRELIMINARY CLIMATE SUMMARY FOR OCTOBER & NOVEMBER CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY GUST RMY: R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 10/1 55/51/53/-4/0.03/000/00 39 NE RMY N/A 10/2 51/47/49/-8/0.18/000/00 40 NE RMY 43 10/3 51/45/48/-8/0.31/000/00 38 NE RMY N/A 10/4 55/49/52/-4/0.00/474/68 35 E RMY 40 10/5 59/46/53/-3/T/125/18 21 NE RMY 20 10/6 68/43/56/+1/0.00/663/96 17 NW RMY 17 10/7 69/46/58/+3/0.00/640/93 20 W RMY 20 10/8 63/49/56/+2/0.00/678/99 21 S RMY N/A 10/9 68/50/59/+5/0.27/130/19 45 S RMY 49 10/10 59/44/52/-2/0.00/673/99 * 33 NNW RMY N/A 10/11 67/46/57/+4/0.00/582/86 26 SW RMY 28 10/12 76/50/63/+10/0.00/647/96 22 SSW RMY 24 10/13 70/55/63/+10/0.27/208/31 23 S RMY 24 10/14 66/46/56/+4/0.00/428/64 26 W RMY 29 10/15 60/41/51/-1/0.00/659/99 20 SW RMY 27 10/16 60/44/52/+1/T/471/71 31 W RMY 34 10/17 54/35/45/-6/T/482/73 30 WNW RMY 33 10/18 45/28/37/-14/0.00/480/73 24 NNW RMY 25 10/19 47/26/37/-13/0.00/648/99 25 SSW RMY 30 10/20 65/43/54/+4/0.00/306/47 28 SW RMY 28 10/21 59/51/55/+5/0.01/039/06 18 SSE RMY 21 10/22 71/51/61/+12/T/149/23 31 W RMY 34 10/23 55/34/45/-4/0.00/541/84 31 NNW RMY 34 10/24 46/33/40/-9/0.00/000/00 15 SSE RMY N/A 10/25 59/44/52/+3/0.04/019/03 29 N RMY 31 10/26 53/38/46/-2/0.00/636/100 23 NNW RMY 20 10/27 56/35/46/-2/0.00/531/81 15 SE RMY N/A 10/28 64/44/54/+6/0.63/019/03 53 SSE RMY N/A 10/29 72/52/62/+15/0.95/257/41 53 S RMY N/A 10/30 59/38/49/+2/0.00/626/100 33 WNW RMY 35 10/31 54/32/43/-4/0.00/573/92 18 SSW RMY N/A * Mean temperature on the 10th corrected from 53 to 52. 11/1 59/45/52/+6/T/.../.. 30 SSW RMY 31 11/2 62/47/55/+9/0.00/.../.. 24 W RMY N/A 11/3 71/44/58/+12/0.00/.../.. 25 W RMY 25 11/4 66/49/58/+13/0.00/.../.. 22 SSW RMY N/A 11/5 72/51/62/+17/0.00/.../.. 31 SW RMY 36 11/6 71/60/66/+21/0.00/.../.. 35 SSW RMY 38 11/7 low since midnight is 55F; normal low is now 36F DAILY RECORDS FOR OCTOBER AND NOVEMBER 2015 **11/6 DAILY RECORD MAXIMUM TEMPERATURE OF 71F TIES PREVIOUS RECORD OF 71F SET IN 1959 **11/6 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F BREAKS PREVIOUS RECORD OF 58F SET IN 1938 **11/6 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F TIES PREVIOUS MONTHLY RECORD OF 60F SET ON 11/8/1996 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 7 HIGH 75 IN 1938 LOW 21 IN 1930 PRECIP 2.02 INCHES IN 1953 SNOWFALL 3.5 IN 2012 PEAK GUST 69e ENE IN 1953 RECORDS FOR NOVEMBER 8 HIGH 72 IN 1938 LOW 20 IN 1921 PRECIP 2.24 INCHES IN 1972 SNOWFALL 4.0 IN 1894 PEAK GUST 72e SE IN 1947 TODAY'S REPORT PREPARED BY: Mike Iacono